rogers



(No Model.)

J. H. ROGERS.

TELEPHONE REPEATER.

No. 269,326. Patented Dec.19, 1882.

PATENT @rricn.

JAMES HARRIS ROGERS, OF NEW YORK, N. Y.

TELEPHONE-REPEATER.

SPECIFICATION forming part of Letters Patent No. 269,326, dated December 19, 1882,

(X0 model.)

To all whom it may concern:

Be it known that I, JAMEs HARRIS Roe-Ens, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Telephoneltepeaters, of which the following is a specification.

My invention relates more particularly to that class of telephone-instruments known as telephone-repeaters, and it consists in bend ing or so forming a piece of iron or steel of any desired shape that its two ends or edges will be in close proximity to one another without touching, (said piece of iron or steel being wound at one or more points and preferably at its endor edge with a coil or helix of wire,) and mounting upon the ends or edges varying contact points, pieces, or surfaces suitably insulated, and so arranged that the varying attraction of the two ends or edges due to variations of current in the helix will communicate a movement, molecular or otherwise, to the contact pieces or surfaces, so as to cause corresponding variations of any electric current flowing through them.

The object of my invention is to transmit signals or sounds to a greater distance than has hitherto been done telephonically by suitable arrangements of relay-batteries with my improved repeater.

In the accompanying drawings, Figure 1 illustrates diagrammatically the application of my improved repeater to a telephone-circuit, and shows one-form of said repeater in side view. Fig. 2 illustrates the application of the repeater to a line having an inductioircoil in connection with the repeater at the repeatingpoint.

Referring to Fig. 1, A represents a piece of iron or steel of any desired form or shape, whose two ends are brought into close proximity with one another, so as to be within one anothersmagnetic field, whileD is a magnetiztaching them to or inserting them in the ends of spindles B B, one or both of which maybe adjustable, and which pass through sleeves of insulating material having openings bored through the ends of A, as indicated.

In the diagram the repeater is supposed to be at the repeating or relaying point between two circuits, one of which contains battery E, a suitable telephone-tramsmitter in conjunction therewith, and coil 1), while the other contains the relaying-battery E, the contactvarying electrodes 0 c, the current to which is conveyed through the screws B B, and the receiving-telephone ll at the distant end of the line.

The method of use is obvious. Telephonic vibrations or pulsations produced in the circuit containing battery E by the transmitter communicate by means ot'the magnetizingcoil D vibrations, molecular or otherwise, to the ends of piece A, thus producing variation of the current from E flowing through the electrodes c c and receiving-telephone H.

111 Fig. 2 the arrangement is diflerent from that of Fig. 1 only in that the contact electrodes are included in a local circuit, 5 6 7, with the primary of an induction-coil, T, the secondary of which is connected to the linecircuit 11. 8 10, including the receiving-telephone H. The pulsations set up in the local circuit are reproduced in the line-circuit in the well-known manner, and vibrations or pulsations produced in line-circuit containing the coil D of the repeate are thus relayed onto the line-circuit containing the receiver.

It is obvious that my invention is not confined to any particular form or construction of the contact-varying electrode orelectrodes, or to any particular method of mounting the same.

Repeaters thus constructed might be placed at severalpoints between the transmitting and the receiving telephones.

\Vhat I claim as my invention is-- 1. A telephonic repeater consisting of a piece of iron or steel the two opposite polar ends or edges of which are brought into suit able proximity to one another, anda contactvarying electrode or electrodes mounted on said piece in the manner described, so that by the varying attraction of the two polar ends or edges the current is 'aried.

an electrode carried by the screw, as and for the purpose described.

5. The combination, with the piece A and its helix D, of the insulated screws 13 B, adjustable through openings in the ends of said piece, and electrodes 0 c.

In testimony whereof I have hereunto aflixed 20 my hand in the presence of two subscribing witnesses.

JAS. HAM-HS ROGERS. \Yitnesses J. W. loenrts, COR-A ROGERS. 

